from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A transmitter and receiver housed together in a single unit and having some circuits in common, often for portable or mobile use.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A combined radio transmitter and receiver.
- n. A device that performs transmitting and receiving functions, especially if using common components.
trans(mitter) + (re)ceiver.(American Heritage® Dictionary of the English Language, Fourth Edition)
Blend of transmitter and receiver. (Wiktionary)